package web

import (
	"encoding/json"
	"io"
	"net/http"
	"net/http/httptest"
	"path/filepath"
	"testing"

	"git.noroutes.net/NoRoutes/vibetunes/internal/database"
)

func TestLyricsHandlerPrefersSyncedEntry(t *testing.T) {
	h, db := newTestWeb(t)
	srv := httptest.NewServer(h.NewRouter())
	defer srv.Close()
	jar := map[string]*http.Cookie{}
	doSetup(t, srv, jar, t.TempDir())

	folder, err := database.CreateMusicFolder(db, "Music", "/music", "music")
	if err != nil {
		t.Fatal(err)
	}
	mf, err := database.CreateMediaFile(db, folder.ID, filepath.Join("a.mp3"), 100, 0, "h", "mp3", "song", 10, 128, 44100, 2)
	if err != nil {
		t.Fatal(err)
	}
	song, err := database.UpsertSong(db, database.UpsertSongInput{MediaFileID: mf.ID, Title: "Song"})
	if err != nil {
		t.Fatal(err)
	}
	if _, err := database.InsertLyrics(db, song.ID, "embedded", "xxx", false, []database.LyricsLineInput{{Text: "Plain line"}}); err != nil {
		t.Fatal(err)
	}
	start := 1500
	if _, err := database.InsertLyrics(db, song.ID, "external", "en", true, []database.LyricsLineInput{{StartMs: &start, Text: "Synced line"}}); err != nil {
		t.Fatal(err)
	}

	resp := doRequest(t, srv, jar, http.MethodGet, "/player/lyrics/"+song.ID, nil)
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("status = %d", resp.StatusCode)
	}
	body, _ := io.ReadAll(resp.Body)
	var out lyricsResponseJSON
	if err := json.Unmarshal(body, &out); err != nil {
		t.Fatalf("invalid JSON: %v\n%s", err, body)
	}
	if !out.Synced {
		t.Errorf("expected the synced entry to be preferred, got synced=false: %+v", out)
	}
	if len(out.Lines) != 1 || out.Lines[0].Text != "Synced line" {
		t.Fatalf("lines = %+v", out.Lines)
	}
	if out.Lines[0].StartMs == nil || *out.Lines[0].StartMs != 1500 {
		t.Errorf("StartMs = %v, want 1500", out.Lines[0].StartMs)
	}
}

func TestLyricsHandlerNoLyricsReturnsEmpty(t *testing.T) {
	h, db := newTestWeb(t)
	srv := httptest.NewServer(h.NewRouter())
	defer srv.Close()
	jar := map[string]*http.Cookie{}
	doSetup(t, srv, jar, t.TempDir())

	folder, err := database.CreateMusicFolder(db, "Music", "/music", "music")
	if err != nil {
		t.Fatal(err)
	}
	mf, err := database.CreateMediaFile(db, folder.ID, "b.mp3", 100, 0, "h2", "mp3", "song", 10, 128, 44100, 2)
	if err != nil {
		t.Fatal(err)
	}
	song, err := database.UpsertSong(db, database.UpsertSongInput{MediaFileID: mf.ID, Title: "No Lyrics"})
	if err != nil {
		t.Fatal(err)
	}

	resp := doRequest(t, srv, jar, http.MethodGet, "/player/lyrics/"+song.ID, nil)
	body, _ := io.ReadAll(resp.Body)
	var out lyricsResponseJSON
	if err := json.Unmarshal(body, &out); err != nil {
		t.Fatalf("invalid JSON: %v\n%s", err, body)
	}
	if len(out.Lines) != 0 {
		t.Errorf("expected no lines, got %+v", out.Lines)
	}
}

func TestLyricsHandlerRequiresAuth(t *testing.T) {
	h, _ := newTestWeb(t)
	srv := httptest.NewServer(h.NewRouter())
	defer srv.Close()
	jar := map[string]*http.Cookie{}
	resp := doRequest(t, srv, jar, http.MethodGet, "/player/lyrics/sg_whatever", nil)
	if resp.StatusCode == http.StatusOK {
		t.Fatal("expected unauthenticated request to be rejected/redirected, got 200")
	}
}